Those stats were a game mechanic that fell off very early in development, the farther into the story you get, the less those stats matter. Very few events get changed based on those stats in the mid to late game, most of the time you can bypass any requirement with a certain light or high enough personnel stats. Off the top of my head I can only remember 1 or 2 events in the mid game that have a noticeable difference depending on the girls L/L/S stats, and that's only because I was going down a romance style playthrough, those 2 events can just as easily be bypassed by choosing either blackmail/cum-addiction/slave-contracts.
Edit: If you want to go down a romance/seduce play style the stat you will most likely want to focus on is your attraction and maybe fitness.